Abashian-Booth-Crowe Effect in Basic Double-Pionic Fusion: A New Resonance?

被引：212

作者：

Adlarson, P. ^{[1
]}

Adolph, C. ^{[2
]}

Augustyniak, W. ^{[3
]}

Baru, V. ^{[4
,5
]}

Bashkanov, M. ^{[6
]}

Bednarski, T. ^{[7
]}

Bergmann, F. S. ^{[8
]}

Berlowski, M. ^{[3
]}

Bhatt, H. ^{[9
]}

Brinkmann, K. -T. ^{[10
]}

Buescher, M. ^{[4
,11
]}

Calen, H. ^{[1
]}

Clement, H. ^{[6
]}

Coderre, D. ^{[4
,11
,12
]}

Czerwinski, E. ^{[7
]}

Doroshkevich, E. ^{[6
]}

Ekstrom, C. ^{[13
]}

Engels, R. ^{[4
,11
]}

Erven, W. ^{[11
,14
]}

Eyrich, W. ^{[2
]}

Fedorets, P. ^{[4
,5
]}

Foehl, K. ^{[15
]}

Fransson, K. ^{[1
]}

Goldenbaum, F. ^{[4
,11
]}

Goslawski, P. ^{[8
]}

Grigoryev, K. ^{[4
,11
,16
]}

Grishina, V. ^{[5
]}

Gullstrom, C. -O. ^{[1
]}

Hampe, J. ^{[4
,11
,17
]}

Hanhart, C. ^{[4
,11
,18
]}

Heijkenskjold, L. ^{[1
]}

Hejny, V. ^{[4
,11
]}

Hinterberger, F. ^{[10
]}

Hodana, M. ^{[4
,7
,11
]}

Hoistad, B. ^{[1
]}

Jacewicz, M. ^{[1
]}

Janusz, M. ^{[7
]}

Jany, A. ^{[7
]}

Jany, B. R. ^{[7
]}

Jarczyk, L. ^{[7
]}

Johansson, T. ^{[1
]}

Kamys, B. ^{[7
]}

Kemmerling, G. ^{[11
,14
]}

Khakimova, O. ^{[6
]}

Khoukaz, A. ^{[8
]}

Kistryn, S. ^{[7
]}

Klaja, J. ^{[4
,7
,11
]}

Kleines, H. ^{[11
,14
]}

Klos, B. ^{[19
]}

Kren, F. ^{[6
]}

机构：

[1] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden

[2] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany

[3] Andrzej Soltan Inst Nucl Studies, PL-90950 Lodz, Poland

[4] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany

[5] State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Moscow 117218, Russia

[6] Univ Tubingen, Inst Phys, D-72076 Tubingen, Germany

[7] Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland

[8] Univ Munster, Inst Kernphys, D-48149 Munster, Germany

[9] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India

[10] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[11] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany

[12] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany

[13] Uppsala Univ, Svedberg Lab, S-75121 Uppsala, Sweden

[14] Forschungszentrum Julich, Zentralinst Elekt, D-52425 Julich, Germany

[15] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany

[16] Petersburg Nucl Phys Inst, Div High Energy Phys, Gatchina 188300, Russia

[17] Rhein Westfal TH Aachen, Phys Inst B3, D-52056 Aachen, Germany

[18] Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany

[19] Univ Silesia, August Chelkowski Inst Phys, PL-40007 Katowice, Poland

[20] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[21] Joint Inst Nucl Res, Dubna 141980, Russia

[22] Indian Inst Technol, Dept Phys, Indore 452017, Madhya Pradesh, India

[23] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 24期

关键词：

ROPER RESONANCE; EXCLUSIVE MEASUREMENTS; MESON PRODUCTION; COLLISIONS; EXCITATION;

D O I：

10.1103/PhysRevLett.106.242302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on an exclusive and kinematically complete high-statistics measurement of the basic double-pionic fusion reaction pn -> d pi(0)pi(0) over the full energy region of the ABC effect, a pronounced low-mass enhancement in the pi pi-invariant mass spectrum. The measurements, which cover also the transition region to the conventional t- channel Delta Delta process, were performed with the upgraded WASA detector setup at COSY. The data reveal the Abashian-Booth-Crowe effect to be uniquely correlated with a Lorentzian energy dependence in the integral cross section. The observables are consistent with a narrow resonance with m = 2.37 GeV, Gamma approximate to 70 MeV and I(J(P)) = 0(3(+)) in both pn and Delta Delta systems. Necessary further tests of the resonance interpretation are discussed.

引用

页数：4

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